US9595267B2 - Method and apparatus for decoding an audio signal - Google Patents
Method and apparatus for decoding an audio signal Download PDFInfo
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- US9595267B2 US9595267B2 US14/558,649 US201414558649A US9595267B2 US 9595267 B2 US9595267 B2 US 9595267B2 US 201414558649 A US201414558649 A US 201414558649A US 9595267 B2 US9595267 B2 US 9595267B2
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
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Abstract
Description
y=G·p [Equation 3]
y=GDx [Equation 4]
Lo=L*GL_L+C*GC_L+R*GR_L+Ls*GLs_L+Rs*GRs_L
Ro=L*GL_R+C*GC_R+R*GR_R+Ls*GLs_R+Rs*GRs_R [Equation 10]
FL_L=D_L*GL_L (a coefficient used for generating the left output from input mono downmix signal)
FL_R=D_L*GL_R (a coefficient used for generating the right output from input mono channel signal) [Equation 11]
FL_L2=D_L2*GL_L (a coefficient used for generating the left output from a right downmix signal of the input stereo downmix signal)
FL_R1=D_L1*GL_R (a coefficient used for generating the right output from a left downmix signal of the input stereo downmix signal)
FL_R2=D_L2*GL_R (a coefficient used for generating the right output from a right downmix signal of the input stereo downmix signal) [Equation 12]
HM_L=FL_L+FR_L+FC_L+FLS_L+FRS_L+FLFE_L
HM_R=FL_R+FR_R+FC_R+FLS_R+FRS_R+FLFE_R
HL_L=FL_L1+FR_L1+FC_L1+FLS_L1+FRS_L1+FLFE_L1
HR_L=FL_L2+FR_L2+FC_L2+FLS_L2+FRS_L2+FLFE_L2
HL_R=FL_R1+FR_R1+FC_R1+FLS_R1+FRS_R1+FLFE_R1
HR_R=FL_R2+FR_R2+FC_R2+FLS_R2+FRS_R2+FLFE_R2 [Equation 13]
HM_L(n+j)=HM_L(n)*a+HM_L(n+k)*(1−a)
HM_R(n+j)=HM_R(n)*a+HM_R(n+k)*(1−a)
HL_L(n+j)=HL_L(n)a+HL_L(n+k)*(1−a)
HR_L(n+j)=HR_L(n)*a+HR_L(n+k)*(1−a)
HL_R(n+j)=HL_R(n)*a+HL_R(n+k)(1−a)
HR_R(n+j)=HR_R(n)*a+HR_R(n+k)(1−a) [Equation 14]
a=j/k [Equation 15]
HM_L(n)′=HM_L(n)b+HM_L(n−1)′*(1−b)
HM_R(n)′=HM_R(n)*b+HM_R(n−1)′*(1−b) [Equation 16]
HM_L(n+j)′=(HM_L(n)*a+HM_L(n+k)*(1−a))b+HM_L(n+j−1)′*(1−b)
HM_R(n+j)′=(HM_R(n)*a+HM_R(n+k)*(1−a))b+HM_R(n+j−1)′*(1−b) [Equation 17]
Claims (4)
Priority Applications (1)
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US14/558,649 US9595267B2 (en) | 2005-05-26 | 2014-12-02 | Method and apparatus for decoding an audio signal |
Applications Claiming Priority (11)
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US68457905P | 2005-05-26 | 2005-05-26 | |
US75998006P | 2006-01-19 | 2006-01-19 | |
US77672406P | 2006-02-27 | 2006-02-27 | |
US77941706P | 2006-03-07 | 2006-03-07 | |
US77944106P | 2006-03-07 | 2006-03-07 | |
US77944206P | 2006-03-07 | 2006-03-07 | |
KR1020060030670A KR20060122695A (en) | 2005-05-26 | 2006-04-04 | Method and apparatus for decoding audio signal |
KR10-2006-0030670 | 2006-04-04 | ||
PCT/KR2006/001987 WO2006126844A2 (en) | 2005-05-26 | 2006-05-25 | Method and apparatus for decoding an audio signal |
US91531908A | 2008-09-24 | 2008-09-24 | |
US14/558,649 US9595267B2 (en) | 2005-05-26 | 2014-12-02 | Method and apparatus for decoding an audio signal |
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PCT/KR2006/001987 Continuation WO2006126844A2 (en) | 2005-05-26 | 2006-05-25 | Method and apparatus for decoding an audio signal |
US11/915,319 Continuation US8917874B2 (en) | 2005-05-26 | 2006-05-25 | Method and apparatus for decoding an audio signal |
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US20150088530A1 US20150088530A1 (en) | 2015-03-26 |
US9595267B2 true US9595267B2 (en) | 2017-03-14 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20160232901A1 (en) * | 2013-10-22 | 2016-08-11 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method for decoding and encoding a downmix matrix, method for presenting audio content, encoder and decoder for a downmix matrix, audio encoder and audio decoder |
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US7965848B2 (en) * | 2006-03-29 | 2011-06-21 | Dolby International Ab | Reduced number of channels decoding |
WO2009031870A1 (en) | 2007-09-06 | 2009-03-12 | Lg Electronics Inc. | A method and an apparatus of decoding an audio signal |
JP5883561B2 (en) * | 2007-10-17 | 2016-03-15 | フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ | Speech encoder using upmix |
JP4917189B2 (en) | 2009-09-01 | 2012-04-18 | パナソニック株式会社 | Digital broadcast transmission apparatus, digital broadcast reception apparatus, and digital broadcast transmission / reception system |
KR20120004909A (en) | 2010-07-07 | 2012-01-13 | 삼성전자주식회사 | Method and apparatus for 3d sound reproducing |
JP5521908B2 (en) | 2010-08-30 | 2014-06-18 | ヤマハ株式会社 | Information processing apparatus, acoustic processing apparatus, acoustic processing system, and program |
JP5518638B2 (en) | 2010-08-30 | 2014-06-11 | ヤマハ株式会社 | Information processing apparatus, sound processing apparatus, sound processing system, program, and game program |
MX2013010537A (en) | 2011-03-18 | 2014-03-21 | Koninkl Philips Nv | Audio encoder and decoder having a flexible configuration functionality. |
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